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We build a set of composite galaxy SEDs by de-redshifting and scalingmulti-wavelength photometry from galaxies in the ZFOURGE survey, covering theCDFS, COSMOS, and UDS fields. From a sample of ~4000 K_s-band selectedgalaxies, we define 38 composite galaxy SEDs that yield continuouslow-resolution spectra (R~45) over the rest-frame range 0.1-4 um. Additionally,we include far infrared photometry from the Spitzer Space Telescope and theHerschel Space Observatory to characterize the infrared properties of ourdiverse set of composite SEDs. From these composite SEDs we analyze therest-frame UVJ colors, as well as the ratio of IR to UV light (IRX) and the UVslope ($\beta$) in the IRX$-\beta$ dust relation at 1<z<3. Blue star-formingcomposite SEDs show IRX and $\beta$ values consistent with local relations;dusty star-forming galaxies have considerable scatter, as found for local IRbright sources, but on average appear bluer than expected for their IR fluxes.We measure a tight linear relation between rest-frame UVJ colors and dustattenuation for star-forming composites, providing a direct method forestimating dust content from either (U-V) or (V-J) rest-frame colors forstar-forming galaxies at intermediate redshifts.

UV to IR Luminosities and Dust Attenuation Determined from ~4000 K-Selected Galaxies at 1